K2dAY9Xx

1import android.os.Bundle;
2import android.support.v7.app.AppCompatActivity;
3import android.util.Base64;
4import android.view.View;
5import android.widget.Button;
6import android.widget.ImageView;
7import android.widget.TextView;
8import android.widget.Toast;
9import java.security.MessageDigest;
10import java.util.Arrays;
11import javax.crypto.Cipher;
12import javax.crypto.spec.SecretKeySpec;
13
14public class aa_test extends AppCompatActivity {
15    ImageView imageView;
16
17    private static String decryptedString;
18    private static String encryptedString;
19    private static byte[] key;
20    private static SecretKeySpec secretKey;
21    Button de_button;
22    TextView decryptTextView;
23    Button en_button;
24    TextView encryptTextView;
25
26
27
28    public static String decrypt(String paramString)
29    {
30        try
31        {
32            Cipher localCipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
33            localCipher.init(2, secretKey);
34            paramString = new String(localCipher.doFinal(Base64.decode(paramString, 0)));
35            return paramString;
36        }
37        catch (Exception e)
38        {
39            System.out.println("Error while decrypting: " + paramString.toString());
40        }
41        return null;
42    }
43
44    public static String encrypt(String paramString)
45    {
46        try
47        {
48            Cipher localCipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
49            localCipher.init(1, secretKey);
50            paramString = Base64.encodeToString(localCipher.doFinal(paramString.getBytes("UTF-8")), 0);
51            return paramString;
52
53        }
54        catch (Exception e)
55        {
56            System.out.println("Error while encrypting: " + paramString.toString());
57        }
58        return null;
59    }
60
61
62    @Override
63    protected void onCreate(Bundle savedInstanceState) {
64        super.onCreate(savedInstanceState);
65        setContentView(R.layout.activity_aa_test);
66
67        this.encryptTextView = ((TextView)findViewById(R.id.textView_encryptTextView));
68        this.decryptTextView = ((TextView)findViewById(R.id.textView_decryptTextView));
69        setKey("pin123");
70
71
72    }
73
74    public void setKey(String paramString)
75    {
76        try
77        {
78            key = paramString.getBytes("UTF-8");
79            System.out.println(key.length);
80            key = MessageDigest.getInstance("SHA-1").digest(key);
81            key = Arrays.copyOf(key, 16);
82            System.out.println(key.length);
83            System.out.println(new String(key, "UTF-8"));
84            secretKey = new SecretKeySpec(key, "AES");
85            return;
86        }
87        catch (Exception e)
88        {
89            //----
90            return;
91        }
92
93    }
94
95    public void Encrypt_String(View view) {
96        String paramAnonymousView = encryptTextView.getText().toString();
97        if (paramAnonymousView.length() > 0){
98            decryptTextView.setText(encrypt(paramAnonymousView));
99        }else{Toast.makeText(aa_test.this.getApplicationContext(), "Please enter the value", Toast.LENGTH_LONG).show();}
100    }
101
102    public void Decrypt_String(View view) {
103        String paramAnonymousView = encryptTextView.getText().toString();
104        if (paramAnonymousView.length() > 0){
105            decryptTextView.setText(decrypt(paramAnonymousView));
106        }else{Toast.makeText(aa_test.this.getApplicationContext(), "Please enter the value", Toast.LENGTH_LONG).show();}
107    }
108}
109	
110<?xml version="1.0" encoding="utf-8"?>
111<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
112xmlns:app="http://schemas.android.com/apk/res-auto"
113xmlns:tools="http://schemas.android.com/tools"
114android:layout_width="match_parent"
115android:layout_height="match_parent"
116android:paddingBottom="@dimen/activity_vertical_margin"
117android:paddingLeft="@dimen/activity_horizontal_margin"
118android:paddingRight="@dimen/activity_horizontal_margin"
119android:paddingTop="@dimen/activity_vertical_margin"
120android:orientation="vertical"
121tools:context="com.test.test.aa_test">
122
123<TextView
124    android:text="Hello"
125    android:textSize="10pt"
126    android:layout_width="match_parent"
127    android:layout_height="wrap_content"
128    android:id="@+id/textView_encryptTextView"
129    android:gravity="center" />
130
131<TextView
132    android:text="- - - -"
133
134    android:textSize="10pt"
135    android:layout_width="match_parent"
136    android:layout_height="wrap_content"
137    android:id="@+id/textView_decryptTextView"
138    android:gravity="center" />
139
140<Button
141    android:text="Encrypt"
142    android:onClick="Encrypt_String"
143    android:layout_width="match_parent"
144    android:layout_height="wrap_content"
145    android:id="@+id/en_button" />
146
147<Button
148    android:text="Decrypt"
149    android:onClick="Decrypt_String"
150    android:layout_width="match_parent"
151    android:layout_height="wrap_content"
152    android:id="@+id/de_button" />
153</LinearLayout>